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Old 12-31-2014, 01:10 PM   #85
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Hey there Mr Morgan I have owned 5 big trucks,My last one is in front of the shop with 1,355,000 on it, rolled in new bearings at 1 million, 7 axles on the ground 555000 lbs on the truck and 43500 lbs on the trailer, 3406 E 500 hp, 1850 lbs torque , 18 speed 4.11 on 46 eatons and she will walk ,it has been fun and all you folks have a Happy New Year!!!!!
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Old 12-31-2014, 03:42 PM   #86
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Hey there Mr Morgan I have owned 5 big trucks,My last one is in front of the shop with 1,355,000 on it, rolled in new bearings at 1 million, 7 axles on the ground 555000 lbs on the truck and 43500 lbs on the trailer, 3406 E 500 hp, 1850 lbs torque , 18 speed 4.11 on 46 eatons and she will walk ,it has been fun and all you folks have a Happy New Year!!!!!

Yea,,, are most company trucks specced that way?

Lol, that would be no. At 40 up an 8% I will blow doors on the typical M11 equipped company truck.

If it even matters, (it doesn't) I own eight tractors right now. One of them even has the M11 that I drove all over the state of Montana, not because I wanted to take this truck to the mountains, but because I had to.


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Old 12-31-2014, 04:04 PM   #87
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In early 80's that was a good straight truck engine...
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Old 12-31-2014, 07:25 PM   #88
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Wasn't available in the 80s

Its previous incarnation was the L10, which was subsequently upgraded to the M11.

The L10 was ten liter displacement, while the M11 was an eleven liter engine.

Both were used heavily, and mostly, in class eight truck tractors, especially popular among large fleet companies.

It left production in 2011, but engines in the 11 and 12 litre range are commonly used in service with large fleets.

The point is..... Some trucks might smoke me and my trailer up an 8% grade, (which incidentally will NEVER be found on an interstate), but MOST of them will not.

A six percent grade? I am going 70, till I get stuck behind a truck.


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Old 01-01-2015, 09:07 AM   #89
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The newer 1/2 tons with six, and even eight speed transmissions do a surprisingly better job at towing than the same truck did with the four speed transmissions.

That said, I'd place bets your truck won't hold 70 on some of the hills on IH10 West of San Antonio while pulling the trailer, assuming you start at the bottom of the hill at 70.

Do I see a "contest" in the near future?

(I tried but couldn't think of a better way to "liven up" this thread)
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Old 01-01-2015, 09:38 AM   #90
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There is no doubt that My truck will pull 70 on the hills by San Antonio.

Texas Canyon on I 10 in SE AZ I can pull at 70 easy, either east or west of Benson. It is at least as steep and long as any hills around Kerville. Same with the pull between El Paso and Sierra Blanca, and the pull over the Guadalupe mountains between Carlsbad and El Paso.

I know we have had this conversation before, I respect your skepticism, but I am telling the truth about this.

Remember, my whole rig weighs less than 12K.

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Old 01-01-2015, 10:12 AM   #91
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Yea, I've also been on all those roads you mention, and specifically the Texas Canyon is longer, but only as steep for a short while. And, while I believe you believe your truck will pull those hills at those speeds, I too had a 1/2 ton GMC with the 5.3L engine towing a 25' wide body, and so I didn't fall off the turnip truck yesterday.

Your truck will pull better than mine did because of the six speed transmission, but I'm skeptical it will pull that much better.

And then even if it did, you will have to be whipping the horses. I don't like to do that because they don't like it, and they last longer if you don't.
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Old 01-01-2015, 12:49 PM   #92
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Well, we want the video (not in the least serious). I'm thinking that at 70 there is a pretty fair amount of air resistance. While low weight makes the claim plausible (even though I haven't pulled the grades mentioned in a gasser in twenty years; but I may run the section past Kville 3X weekly) it is the reduced wind resistance of a 70's A/S that makes it even possible. Call that potentially possible for skeptics (I'll take it as given).

Not a tenable claim with a small block and a 28' white box. Maybe not even a big block.

A video and supporting scale tickets would be most fun for supporting the case of "Why Airstream?" The HP demand is so low that a little ol' half ton can run 70 uphill and get XX mpg on the flats pulling a long TT.

No one can claim that a 1T is as easy to run around in solo as a 1/2T. Since the majority of miles is always solo, it is a convincing sort of evidence.

A half ton with a 4BT Cummins is a real mpg champ. Might not run 70 uphill with a TT, but in the spirit of a good lookin' DIY resto A/S it would make a helluva combined rig. Low entry cost and superlative performance.


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Old 01-01-2015, 02:50 PM   #93
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Yea, I've also been on all those roads you mention, and specifically the Texas Canyon is longer, but only as steep for a short while. And, while I believe you believe your truck will pull those hills at those speeds, I too had a 1/2 ton GMC with the 5.3L engine towing a 25' wide body, and so I didn't fall off the turnip truck yesterday.

Your truck will pull better than mine did because of the six speed transmission, but I'm skeptical it will pull that much better.

And then even if it did, you will have to be whipping the horses. I don't like to do that because they don't like it, and they last longer if you don't.

My 08 has a four speed and just turned 100k.

I know the hills you are talking about well. The climb out of Benson either east or west is a longer harder climb. It involves a significant increase in elevation that the hills around Kerville are no match. Going east it is a steady climb for over ten miles till the apex at Johnson road.. (The thing)

Perhaps some day I will make a video....

Now having bought Identical trucks all at one time, I will be the first to admit that a person can take two identical vehicles, and one might run much better than the other. Strange but true.

It might just be that I got a good one.



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Old 01-01-2015, 02:58 PM   #94
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Just so happens I have a couple of scale tickets today.

They show my error, the combined weight of my units is about 12K.

I may not be the best of character, but I am not going to come on this forum in front of hundreds of people and intentionally make assertive and repeated claims that are not true.

Ranger hill on I-20 is I think comparable to the hills around Kerville, I take this at 70 easy.

Now maybe I am not remembering these hills right, and I have not taken my rig over these hills, could be you are right because I cant apply actual experience, but judging by what my truck has done elsewhere, I really think I can pull those at 70, and easy.

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Old 01-01-2015, 03:25 PM   #95
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Here's my weight ticket of my '07 GMC extended cab with fiberglass camper cover and '01 25' Classic. I was about 800lbs heavier than you, and although the Texas Canyon wasn't so bad, the hills around Kerrville would have me in second gear because it wouldn't pull third, or drive, and I wouldn't turn it over 4,000RPM continuous. That put me at about 50MPH as I remember.

My truck was geared 3.73:1, and was a 2WD.

There was one climb I remember going out of Cedar City Utah towards the East (scenic route and that's why we took it) where there was a sign just out of town that said something like "Steep grades and sharp turns ahead, not recommended for trucks", and that was a 30MPH, first gear climb for about what seemed like five miles. My transmission temp was at 230 degrees when we got to the top.
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Old 01-01-2015, 07:51 PM   #96
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JMorgan, I might disagree on other things, but I wasn't trying to back you into a corner, here. A video was meant to be in fun not for "proof". Just as I don't think it fair to debate skill despite differences (it isn't relevant, but risk minimization is) I'm not really interested in debating a few mph. Mpg counts, not ascent speed.

There's only a few of us interested in these kind of details so let's not antagonize each other. It's more fun to find out what is versus what isn't. Scale tickets and videos should be fun. What do the numbers mean? How can relate our experiences? Etc.

The ascent westbound on IH10 from Comfort is three gears down with a 13 behind a 600 HP/ 2050 TQ Cummins Signature and a gross of around 76k with a short wheelbase bulk tanker. There is another hard grade a few miles past Kville along with a few more prior to the split at IH20.

So for fun, as these trips are with an empty trailer (30k tare) on the return, imagine the surprise for others when we're running eighty up those grades when conditions are right. Can even gain speed depending on cruise control software aggressiveness. Ha!!


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Old 01-01-2015, 08:50 PM   #97
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I am not the slightest bit upset about our exchange here, I try to keep things brief and to the point so it may seem that way.

It is hard to read tone in text messages sometimes.


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Old 01-01-2015, 09:27 PM   #98
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Yes as to tone. I'm more than guilty of not considering my words as carefully as I should. I'm even more fun in person.


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